Well, I read on the interweb that some guy's 770 in .308 performed flawlessly for two years and accounted for two deer, and he said there was another 770 in .308 in the camp and a 7mm Rem mag 710, no complaints from either owner. So I guess that scientifically observed statistical sample of three means they are all good while all the complaints and defects I heard and my buddy saw and I read on the web don't matter.
If you already have a 710 or 770 you like, good for you, keep it and use it because the resale value is negligible. If you don't have one, better for you, and look to one of the alternatives, of which there are several, that don't have the crappy reputation of the 710/770 models. Just in case for any reason, you decide to sell it.